Other back-up functions are connected to the input TRINP_3P as described above for
three-pole tripping. A typical connection for a single-pole tripping scheme is shown in
figure 385.
ANSI05000545=5=en=Original.vsd
BLOCK
BLKLKOUT
TRINP_3P
TRINP_A
TRINP_B
TRINP_C
PS_A
PS_B
PS_C
1PTRZ
1PTRGF
P3PTR
SETLKOUT
RSTLKOUT
CND
TRIP
SMPPTRC
TR_A
TR_B
TR_C
TR1P
TR2P
TR3P
CLLKOUT
BFI_3P
BFI_A
BFI_B
BFI_C
FW
REV
Phase segregated trip A, B and C
from example line differential or
distance protection
Phase selection A, B and C from
external phase selection logic
Trip by communication scheme of
distance protection if required to
provide a single pole trip
Trip by communication scheme of
earth fault protection if required to
provide a single pole trip
To activate lockout for any trip
To reset lockout
Protection functions with 3
phase trip, for example time
delayed overcurrent protection
OR
To prepare 3 phase trip
for any trip signal
SMBRREC
PREP3P
TR3P
ANSI05000545 V5 EN
Figure 385: The trip logic function SMPPTRC (94) used for single-pole tripping
application
17.1.2.3 Single-, two- or three-pole tripping
The single-/two-/three-pole tripping mode provides single-pole tripping for single-phase
faults, two-pole tripping for two-phase faults and three-pole tripping for three-phase
faults. The operating mode is always used together with an autoreclosing scheme with
setting ARMode = 1/2/3 ph or ARMode = 1/2 Ph.
The functionality is very similar to the single-phase scheme described above. However, in
addition to the connections for single phase above, SMBRREC (79) must also be informed
Section 17 1MRK 506 369-UUS -
Logic
794 Line distance protection REL670 2.2 ANSI
Application manual
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